Synthesis of new (Bi, La)3MSb2O11 phases (M = Cr, Mn, Fe) with KSbO3-type structure and their magnetic and photocatalytic properties

Abstract

Synthesis and structure of new (Bi, La) 3 MSb 2 O 11 phases (M = Cr, Mn, Fe) are reported in conjunction with their magnetic and photocatalytic properties. XRD refinements reflect that O 11 adopt KSbO 3 -type structure (space group, Pn3). The structure can be described through three interpenetrating networks where the first is the (M/Sb)O 6 octahedral network and other two are the identical networks having Bi 6 O 4 composition. The magnetic measurements on Bi 2 LaCrSb 2 O 11 and Bi 2 LaMnSb 2 O 11 show paramagnetic behaviour with magnetic moments close to the expected spin only magnetic moments of Cr +3 and Mn +3 . The UV-Visible diffuse reflectance spectra are broad and indicate that these materials possess a bandgap of ∼ 2 eV. The photocatalytic activity of these materials has been investigated by degrading Malachite Green (MG) under exposure to UV light.

Visible light assisted photocatalytic degradation of organic dyes on TiO2–CNT nanocomposites

“…The photocatalytic experiments were carried out in a photoreactor, which consists of two parts, quartz jacketed tube where the lamp was placed inside the tube and a Pyrex reactor in which the catalyst was suspended in the dye solution [46]. The catalysts (1 g/L) were dispersed in 50 ppm of dye solution and continuously stirred to ensure uniform dispersion of catalyst during reaction.…”

High-Pressure Synthesis and Magnetic and Electrical Properties of Fe-Doped Bi3Re3O11 and Bi3Os3O11

“…This was likely due to the propensity of Bi atoms to form structures with various counter elements. To the best of our knowledge, the following bismuth-based KSbO 3 -type oxides have been synthesized: Bi 3 Ru 3 O 11 , Bi 3 Os 3 O 11 , Bi 3 Re 3 O 11 , Bi 3 Ge 3 O 10.5 , Bi 3 Cr 2.91 O 11 , Bi 3 Mn 3 O 11+δ (−0.5 ≤ δ ≤ 0.6), , Bi 3 Mn 1.9 Te 1.1 O 11 , Bi 3 CrSb 2 O 11 , Bi 3 FeSb 2 O 11 , Bi 2 LaFeSb 2 O 11 , Bi 2 LaMnSb 2 O 11 , Bi 2 LaCrSb 2 O 11 , NaBi 2 Sb 3 O 11 , and Bi 6 Ti 5 WO 22 , Bi 9 Ni 2 Sb 7 O 33 . However, all but Bi 3 Mn 3 O 11+δ and Bi 3 Cr 2.91 O 11 are paramagnetic and show no long-range magnetic ordering down to low temperature.…”

High-pressure synthesis, crystal structure, and magnetic properties of KSbO3-type 5doxides K0.84OsO3and Bi2.93Os3O11

“…The KSbO 3 -type family of oxides consists of several compositional variants have been synthesized and characterized by the similar tunnel motifs, such as the following: AM O 3 : KSbO 3 [1], KIrO 3 [9], BaOsO 3 [10], KBiO 3 [4, 11], AgBiO 3 [12]; A 3 M 3 O 11 : La 3 Ir 3 O 11 [13], Bi 3 Ru 3 O 11 [3], La 3 Ru 3 O 11 [7, 14], Bi 3 Os 3 O 11 [15, 16], Bi 3 Mn 1.9 Te 1.1 O 11 [17], Bi 3 Re 3 O 11 [18], Bi 3 CrSb 2 O 11 [19], Bi 2 La M Sb 2 O 11 ( M = Cr, Mn, Fe) [19], NaBi 2 Sb 3 O 11 [20]; A 2 M 3 O 9 : Sr 2 Re 3 O 9 [18]; A 4 M 6 O 19 : La 4 Re 6 O 19 [18], Pb 6 Re 6 O 19 [18], Ba 4 Os 6 O 18 Cl [21], La 4 Os 6 O 19 [21], Sr 4 Ru 6 ClO 18 [22], and La 4 Ru 6 O 19 [7, 8]. …”

“…A 3 M 3 O 11 : La 3 Ir 3 O 11 [13], Bi 3 Ru 3 O 11 [3], La 3 Ru 3 O 11 [7, 14], Bi 3 Os 3 O 11 [15, 16], Bi 3 Mn 1.9 Te 1.1 O 11 [17], Bi 3 Re 3 O 11 [18], Bi 3 CrSb 2 O 11 [19], Bi 2 La M Sb 2 O 11 ( M = Cr, Mn, Fe) [19], NaBi 2 Sb 3 O 11 [20];…”